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Break-Even Calculator

What is this tool?

A focused break-even and contribution-margin calculator. Enter price, unit cost and fixed costs, and it computes your contribution margin, break-even units, break-even revenue, and (given an expected volume) your margin of safety — plotted on a cost-vs-revenue chart.

When to use it

  • Checking a product or service's break-even point before launch
  • Estimating how many units you need to sell to cover fixed costs
  • Understanding how much cushion (margin of safety) you have above break-even
  • Seeing how a price or cost change shifts your break-even point
  • Sanity-checking a pricing decision before committing to it

How to use it

  1. 1Enter your price per unit and variable cost per unit
  2. 2Enter your fixed costs per month
  3. 3Enter your expected monthly volume to see margin of safety
  4. 4Read the break-even units, break-even revenue and contribution margin
  5. 5Adjust any input and watch the chart and results update instantly

Frequently asked questions

What is the break-even point?

The sales volume (in units or revenue) at which total revenue equals total costs — below it you're operating at a loss, above it you're profitable.

What is contribution margin?

Price minus variable cost per unit — how much each unit sold contributes toward covering fixed costs before you break even.

What is margin of safety?

How far your expected sales volume is above the break-even point, as a percentage — a cushion against a sales shortfall.

Is my financial data sent anywhere?

No — every calculation happens locally in your browser.